ci: transfer the accepted workstation Android SDK license

scripts/setup-android-ci.ps1

@@ -26,10 +26,13 @@ Move-Item -LiteralPath $source -Destination $destination
 $env:ANDROID_HOME = $sdkRoot
 $env:ANDROID_SDK_ROOT = $sdkRoot
 $manager = Join-Path $destination 'bin\sdkmanager.bat'
-$answers = ('y' + [Environment]::NewLine) * 100
-$answers | & $manager "--sdk_root=$sdkRoot" --licenses | Out-Null
-if ($LASTEXITCODE -ne 0) { throw 'Android SDK license setup failed' }
-$answers | & $manager "--sdk_root=$sdkRoot" 'platform-tools' 'platforms;android-37.0' 'build-tools;37.0.0'
+# Transfer the already accepted workstation license, as documented by Google:
+# https://developer.android.com/studio/intro/update#download-with-gradle
+# The self-hosted runner does not reliably forward stdin to sdkmanager prompts.
+$licenses = Join-Path $sdkRoot 'licenses'
+New-Item -ItemType Directory -Path $licenses -Force | Out-Null
+Copy-Item -LiteralPath (Join-Path $PSScriptRoot 'android-licenses\android-sdk-license') -Destination $licenses
+& $manager "--sdk_root=$sdkRoot" 'platform-tools' 'platforms;android-37.0' 'build-tools;37.0.0'
 if ($LASTEXITCODE -ne 0) { throw 'Android SDK installation failed' }
 foreach ($required in @('platforms\android-37.0\android.jar', 'build-tools\37.0.0\aapt2.exe', 'licenses\android-sdk-license')) {
     if (-not (Test-Path -LiteralPath (Join-Path $sdkRoot $required))) {